Transmissions and Drivetrain Need help with your trans? Problems with your axle?

Factory speedometer gears

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Old Jun 12, 2025 | 04:37 PM
  #1  
Brodini89's Avatar
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Car: 89 formula firebird
Engine: L03 with ported 081 heads/exhaust
Transmission: 700r4
Axle/Gears: 2.73 open
Factory speedometer gears

I apologize if this has been mulled over but I never have any luck finding exactly what im looking for sometimes in the forums. Im curious what an l03, 700r4, with 2.73 gears might have for factory speedometer gears
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Old Jun 12, 2025 | 07:59 PM
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Tuned Performance's Avatar
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From: Mile High Country !!!
Car: 1967 Camaro, 91 z28
Engine: Lb9
Transmission: M20
Axle/Gears: J65 pbr on stock posi 10bolt
Re: Factory speedometer gears

https://www.thirdgen.org/forums/tech...libration.html

might I think I’ve seen Vss gear charts on tgo
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Old Jun 12, 2025 | 08:02 PM
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From: Mile High Country !!!
Car: 1967 Camaro, 91 z28
Engine: Lb9
Transmission: M20
Axle/Gears: J65 pbr on stock posi 10bolt
Re: Factory speedometer gears

https://www.thirdgen.org/forums/tran...ching-2-a.html
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Old Jun 13, 2025 | 12:10 AM
  #4  
Brodini89's Avatar
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Joined: Oct 2024
Posts: 20
Likes: 2
Car: 89 formula firebird
Engine: L03 with ported 081 heads/exhaust
Transmission: 700r4
Axle/Gears: 2.73 open
Re: Factory speedometer gears

Those 2 links were very helpful. I know that a 15 and 41 tooth setup will work for the 3.42 swap im doing. Just wanted to see if I had either of those already because yellow 41 tooth gears are getting hard to find for my particular vss (90-92).
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Old Jun 13, 2025 | 04:23 AM
  #5  
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From: Il
Car: 1989-92 FORMULA350 305 92 Hawkclone
Engine: 4++,350 & 305 CIs
Transmission: 700R4 4800 vig 18th700R4 t56 ZF6 T5
Axle/Gears: 3.70 9"ford alum chunk,dana44,9bolt
Re: Factory speedometer gears

I have a low mile set from a 92 gta. Had 305 tpi auto and aluminum drum limited slip 273 rear gear. Still have the rear and speedo gears.
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Old Jul 1, 2025 | 04:15 PM
  #6  
Brodini89's Avatar
Thread Starter
Junior Member
 
Joined: Oct 2024
Posts: 20
Likes: 2
Car: 89 formula firebird
Engine: L03 with ported 081 heads/exhaust
Transmission: 700r4
Axle/Gears: 2.73 open
Re: Factory speedometer gears

Just as a reference, it appears that the gears i had in my car for 2.73 gears were a 38t and 17t.
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